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09-10-2003, 09:19 AM
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#1 (permalink)
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Sound waves coming from a black hole
Quote:
The black hole resides in the Perseus cluster, located 250 million light years from Earth. In 2002, astronomers obtained a deep Chandra observation that shows ripples in the gas filling the cluster. These ripples are evidence for sound waves that have traveled hundreds of thousands of light years away from the cluster's central black hole...
In musical terms, the pitch of the sound generated by the black hole translates into the note of B flat. But, a human would have no chance of hearing this cosmic performance, because the note is 57 octaves lower than middle-C (by comparison a typical piano contains only about seven octaves). At a frequency over a million, billion times deeper than the limits of human hearing, this is the deepest note ever detected from an object in the universe.
| http://www.sciencedaily.com/releases...0910072317.htm
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09-10-2003, 09:42 AM
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#2 (permalink)
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Much coolness.
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09-10-2003, 10:19 AM
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#3 (permalink)
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Join Date: Dec 2002 Location: -----------
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Interesting.
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09-10-2003, 10:37 AM
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#4 (permalink)
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Join Date: May 2002 Location: Stow, Ohio, Sol III
Posts: 2,211
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Read that today too.
Said that the peaks on the waves were 10 million years apart! 
Man, Imagine how long that would take to d/l with a 56k connection.  | |
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09-10-2003, 04:41 PM
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#5 (permalink)
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Join Date: Feb 2003 Location: Bethalto, IL
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the emmensity of our universal dynamics and organized nuclear chaos is so peacful compared to the viruses on this planet...
I could read about anything space related all day, every day, for the rest of my life, making allocations only for my children's time.
But I'd have to figure out a way to make money doing it, too...
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09-10-2003, 05:19 PM
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#6 (permalink)
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Join Date: Nov 2001 Location: NCSU @ Raleigh, NC
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talk about some major bass
i guess light cant escape a black hole but sound can. im assuming that the sound is being made so low pitched bc of a doppler effect bc the matter that the sound wave is travelling through is being pulled toward the black hole at great speed. does that sound right?
drew
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Duroo
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09-10-2003, 05:50 PM
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#7 (permalink)
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Join Date: Oct 2001 Location: South Jersey
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B flat? I knew it!! | |
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09-10-2003, 05:57 PM
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#8 (permalink)
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Join Date: Oct 2001 Location: Fort Lee, NJ
Posts: 3,417
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I thought black hole gravity was so strong even light couldn't escape.
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09-10-2003, 06:01 PM
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#9 (permalink)
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Join Date: Oct 2001 Location: Earth
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It can't. The sound waves are caused by explosions as matter approaches the event horizon. As the stuff gets closer to the hole, it continues accelerating. As it approaches the speed of light, relativity starts kicking in and there's some serious energy floating around the equation.
That area of space has enough matter to actually support a sound wave. Sound waves do not move through vacuum.
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09-10-2003, 06:02 PM
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#10 (permalink)
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Join Date: Feb 2003 Location: Bethalto, IL
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there's a lot about those things we don't understand, and much that is still debated from what little we have observed
a very cool phenomonon indeed
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